CN112125425A - Composite filter element and water purifier - Google Patents

Abstract

The invention relates to a composite filter element and a water purifier. The composite filter element comprises a reverse osmosis membrane filter element, a reverse osmosis membrane central pipe and a pre-filter element. The reverse osmosis membrane filter element is arranged outside the reverse osmosis membrane central pipe. The raw water inlet, pure water outlet and concentrated water outlet of the reverse osmosis membrane filter element are respectively located on the inner peripheral surface, outer peripheral surface and end surface of the reverse osmosis membrane filter element, which effectively improves the anti-pollution property of the reverse osmosis membrane filter element and prolongs the service life. In order to satisfy the setting of each water port of the reverse osmosis membrane filter element, the pre-filter element assembly is arranged in the reverse osmosis membrane central pipe, and the reverse osmosis membrane central pipe is provided with a first water passage for The pre-filtered water produced by the filtering of the pre-filter element is guided to the raw water inlet of the reverse osmosis membrane filter element. Extend service life while meeting integration levels.

Description

Composite filter element and water purifier

technical field

The invention relates to the technical field of water purification equipment, in particular to a composite filter element and a water purifier.

Background technique

The reverse osmosis membrane filter element is a filter element that uses the principle of reverse osmosis to filter various bacteria, viruses and impurities. It is widely used in water purifiers based on its better filtration effect. With the continuous development of technology in the field of water purifiers, filter elements at all levels are gradually integrated to reduce the volume of water purifiers and improve market competitiveness. The reverse osmosis membrane filter element is relatively expensive, and the service life of each filter element needs to be considered in the process of filter element integration. Therefore, the anti-pollution property of the reverse osmosis membrane filter element needs to be improved, thereby prolonging the service life.

SUMMARY OF THE INVENTION

Aiming at the short service life of the filter element with high integration degree, the invention proposes a composite filter element and a water purifier, which can achieve the technical effect of prolonging the service life.

A composite filter element comprises a reverse osmosis membrane filter element, a reverse osmosis membrane central pipe and a pre-filter assembly, the reverse osmosis membrane filter element is arranged outside the reverse osmosis membrane central pipe, and the raw water inlet of the reverse osmosis membrane filter element, The pure water outlet and the concentrated water outlet are respectively located on the inner peripheral surface, outer peripheral surface and end surface of the reverse osmosis membrane filter element, and the pre-filter element assembly is arranged in the reverse osmosis membrane central pipe, and the reverse osmosis membrane central pipe A first water-passing hole is provided on the top, which is used to guide the pre-filtered water produced by the filtering of the pre-filter element to the raw water inlet of the reverse osmosis membrane filter element.

The above scheme provides a composite filter element, which integrates the reverse osmosis membrane filter element and the pre-filter element, and the reverse osmosis membrane filter element adopts a raw water inlet, a pure water outlet and a concentrated water outlet respectively located in the filter element. The inner peripheral surface, outer peripheral surface and end surface of the reverse osmosis membrane filter element can effectively improve the anti-pollution property of the reverse osmosis membrane filter element and prolong the service life. And in order to meet the setting of each water port of the reverse osmosis membrane filter element, the pre-filter element assembly is integrated in the reverse osmosis membrane central pipe, and the first water passage hole is arranged on the reverse osmosis membrane central pipe, The pre-filtered water produced by the filtering of the pre-filter element can be guided to the raw water inlet of the reverse osmosis membrane filter element. Extend service life while meeting integration levels.

In one of the embodiments, it also includes a pre-filter tube, the pre-filter tube is sleeved outside the pre-filter assembly, and the pre-filter tube is located in the center of the pre-filter assembly and the reverse osmosis membrane Between the tubes, the pre-filter tube and the pre-filter assembly are spaced apart to form a raw water cavity, and the pre-filter tube and the reverse osmosis membrane central tube are spaced to form a pre-filtered water cavity. The water purification direction of the pre-filter element assembly is from outside to inside, and the water production port in the middle of the pre-filter element assembly is communicated with the pre-filtered water cavity.

In one of the embodiments, the end face of the pre-filter element is provided with a pre-filter end cap, the pre-filter tube and the pre-filter end cap are sealed and connected, and the pre-filter end cap is A second water passage hole is provided, and the second water passage hole communicates with the water production port in the middle of the pre-filter element assembly, and the end of the reverse osmosis membrane central tube close to the pre-filter element end cap has a sealed end cap The sealing end cap and the pre-filter end cap are arranged at intervals to form a first water-passing gap, and the first water-passing gap communicates with the second water-passing hole and the pre-filtering water cavity.

In one of the embodiments, it also includes a filter bottle and a rear filter element assembly, the reverse osmosis membrane filter element, the reverse osmosis membrane central pipe, the front filter element assembly and the rear filter element assembly are all located in the filter bottle, and the rear filter element is located in the filter bottle. The filter element assembly and the reverse osmosis membrane filter element are arranged in turn in the axial direction of the filter bottle, and a first pure water gap is formed between the reverse osmosis membrane filter element and the filter bottle, and the rear filter element assembly A second pure water gap is formed between the filter bottle and the first pure water gap, and the first pure water gap communicates with the second pure water gap.

In one of the embodiments, it further includes a water guiding center pipe, an intermediate seal is provided between the rear filter element assembly and the reverse osmosis membrane filter element, and the end face of the rear filter element assembly is pressed against the intermediate seal The middle seal is provided with a third water-passing hole, the sealing end cover is provided with a fourth water-passing hole that is in communication with the third water-passing hole, and the water-conducting center pipe is inserted In the pre-filter element assembly, one end of the water guiding central pipe is communicated with the pure water port of the filter bottle, and the other end of the water guiding central pipe passes through the second water passage hole and communicates with the fourth water hole. The water-passing holes are communicated with each other, the water-conducting central pipe and the side wall of the second water-passing hole are arranged at intervals, and the water-conducting central pipe and the pre-filter element assembly are arranged at intervals.

In one embodiment, the intermediate seal includes a sealing disc, a sealing cylinder and an outer cylinder, the sealing disc is used for abutting against the end surface of the rear filter element assembly, and the third water passage hole is formed in the On the sealing disc, the sealing cylinder is connected with the end face of the sealing disc facing the reverse osmosis membrane filter element, the sealing cylinder is sleeved outside the central tube of the reverse osmosis membrane, and the sealing cylinder is connected to the sealing end The covers are sealed and connected, the outer cylinder is connected to the outer peripheral surface of the sealing disc, one end of the outer cylinder is sleeved on the outer peripheral surface of the reverse osmosis membrane filter element, and the other end of the outer cylinder is sleeved on the rear The outer surface of the filter element.

In one of the embodiments, the sealing disc is abutted against the end face of the reverse osmosis membrane filter element;

Alternatively, the sealing disc and the end face of the reverse osmosis membrane filter element are arranged at intervals;

Alternatively, the outer cylinder includes a first part and a second part in the axial direction, the first part is disconnected from the second part, the first part is sleeved on the outer peripheral surface of the rear filter element, and the first part is connected to the second part. The sealing disc is connected, the second part is sleeved on the outer peripheral surface of the reverse osmosis membrane filter element, and a sealing ring is provided on the end of the sealing cylinder away from the sealing disc, and the inner ring of the sealing ring is connected to the sealing cylinder. The outer ring of the sealing ring is connected with the second part, and the sealing ring is pressed against the end face of the reverse osmosis membrane filter element.

In one embodiment, the intermediate seal includes a rear filter element end cover, a first connection cylinder, a reverse osmosis membrane filter element end cover and a second connection barrel, and the rear filter element end cover is pressed against the rear filter element end cover. The end face of the filter element assembly, the third water passing hole is formed on the end cover of the rear filter element, and the first connecting cylinder is connected to the end face of the rear filter element end cover facing the reverse osmosis membrane filter element, so The end cover of the reverse osmosis membrane filter element is pressed against the end face of the reverse osmosis membrane filter element, the second connecting cylinder is connected to the end face of the reverse osmosis membrane filter element end cover facing the rear filter element assembly, the second The connecting cylinder is sleeved outside the first connecting sleeve, the first connecting sleeve is sleeved outside the central tube of the reverse osmosis membrane, and a sealing member is provided between the second connecting sleeve and the first connecting sleeve, so A seal is provided between the first connecting cylinder and the central pipe of the reverse osmosis membrane.

In one embodiment, both the raw water port and the concentrated water port of the filter bottle and the pure water port are arranged on the same end face of the filter bottle, the raw water port is communicated with the raw water cavity, and the reverse osmosis membrane The end face of the filter element close to the concentrated water outlet is provided with an adapter sleeve, the concentrated water outlet is located on this end face of the reverse osmosis membrane filter element, and the end face of the reverse osmosis membrane filter element and the adapter sleeve are arranged at intervals A concentrated water chamber is formed, and the concentrated water port is communicated with the concentrated water chamber.

In one embodiment, the pre-filter assembly includes a first-stage pre-filter and a second-stage pre-filter, the first-stage pre-filter is sleeved outside the second-stage pre-filter, the The raw water cavity is formed between the first-stage pre-filter and the pre-filter tube at intervals.

In one embodiment, the first-stage pre-filter element includes an origami filter element, the second-stage pre-filter element includes a carbon rod filter element, and the water production port in the middle of the pre-filter element assembly includes the middle of the carbon rod filter element. through hole.

A water purifier includes the above-mentioned composite filter element.

The above solution provides a water purifier. By using the composite filter element described in any one of the above embodiments, the service life can be prolonged while the integration degree is improved.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the structural representation of the composite filter element described in this embodiment;

Fig. 2 is the partial enlarged view of A place in Fig. 1;

Fig. 3 is a partial enlarged view at B in Fig. 1;

4 is a schematic structural diagram of the composite filter element in another embodiment;

Fig. 5 is the partial enlarged view of C place in Fig. 4;

6 is a schematic structural diagram of the composite filter element according to another embodiment;

FIG. 7 is a partial enlarged view of D in FIG. 6 .

Description of reference numbers:

10. Composite filter element; 11. Reverse osmosis membrane filter element; 12. Reverse osmosis membrane central pipe; 121, First water passage hole; 122, Sealed end cap; 13. Pre-filter assembly; 131, First-stage pre-filter; 132, Second-stage pre-filter; 14, Pre-filter pipe; 141, Pre-filter end cap; 1411, Second water hole; 15, Filter bottle; 151, the first pure water gap; 152, the second pure water gap; 153, the pure water outlet; 154, the original water outlet; 155, the concentrated water outlet; 16, the rear filter element assembly; 17, the water guide center pipe; 18 , middle seal; 181, third water hole; 182, sealing disc; 183, sealing cylinder; 184, outer cylinder; 1841, first part; 1842, second part; 185, sealing ring; 186, rear filter element end cover; 187, the first connecting cylinder; 188, the end cover of the reverse osmosis membrane filter element; 189, the second connecting cylinder.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

As shown in FIG. 1 , FIG. 4 and FIG. 6 , in one embodiment, a composite filter element 10 is provided, including a reverse osmosis membrane filter element 11 and a reverse osmosis membrane central pipe 12 , and the reverse osmosis membrane filter element 11 is provided in the In addition to the reverse osmosis membrane central pipe 12 , the reverse osmosis membrane central pipe 12 provides a support foundation for the reverse osmosis membrane filter element 11 . Specifically, the reverse osmosis membrane filter element 11 can be rolled outside the reverse osmosis membrane central pipe 12 , in other words, the reverse osmosis membrane filter element 11 is sleeved outside the reverse osmosis membrane central pipe 12 . The raw water inlet, pure water outlet and concentrated water outlet of the reverse osmosis membrane filter element 11 are located on the inner peripheral surface, the outer peripheral surface and the end surface of the reverse osmosis membrane filter element 11 respectively.

Further, as shown in FIG. 1 , FIG. 4 and FIG. 6 , the composite filter element 10 further includes a pre-filter element assembly 13 , and the pre-filter element assembly 13 is arranged in the reverse osmosis membrane central pipe 12 . The reverse osmosis membrane central tube 12 is provided with a first water passage hole 121 for guiding the pre-filtered water produced by the pre-filter element assembly 13 to the raw water inlet of the reverse osmosis membrane filter element 11 .

A composite filter element 10 provided by the above scheme integrates the reverse osmosis membrane filter element 11 and the pre-filter element assembly 13, and the reverse osmosis membrane filter element 11 adopts a raw water inlet, a pure water outlet and a concentrated water The water outlets are respectively located on the inner peripheral surface, outer peripheral surface and end surface of the reverse osmosis membrane filter element 11 , thereby effectively improving the anti-pollution property of the reverse osmosis membrane filter element 11 and prolonging the service life. And in order to meet the setting of each nozzle of the reverse osmosis membrane filter element 11, the pre-filter element assembly 13 is integrated into the reverse osmosis membrane central pipe 12, and the first reverse osmosis membrane central pipe 12 is provided with the first filter element. The water passage hole 121 . The pre-filtered water generated by the filtering of the pre-filter element assembly 13 can be guided to the raw water inlet of the reverse osmosis membrane filter element 11 and enter the reverse osmosis membrane filter element 11 for further filtration. Extend service life while meeting integration levels.

Specifically, the pre-filter element assembly 13 may include an origami filter element and a carbon rod filter element located in the origami filter element, or the pre-filter element assembly 13 may include a PAC (PP cotton and carbon fiber) filter element, or a carbon melt filter element. When the pre-filter element assembly 13 includes an origami filter element and a carbon rod filter element located in the origami filter element, the water flow direction of the pre-filter element assembly 13 during the water purification process is the direction flowing from the outer circumference to the center, in other words, the origami The filter element is the first-stage pre-filter element 131 of the pre-filter element assembly 13 , and the carbon rod filter element is the second-stage pre-filter element 132 of the pre-filter element assembly 13 . The water filtered by the first-stage pre-filter 131 then enters the second-stage pre-filter 132 for filtration. When the pre-filter element assembly 13 includes the PAC (PP cotton and carbon fiber) filter element, the water flow direction of the pre-filter element assembly 13 during the water purification process may not be limited too much.

Further, in one embodiment, as shown in FIG. 1 , FIG. 4 and FIG. 6 , the composite filter element 10 further includes a pre-filter pipe 14 . The pre-filter pipe 14 is sleeved outside the pre-filter assembly 13, the pre-filter pipe 14 is located between the pre-filter assembly 13 and the reverse osmosis membrane central pipe 12, the pre-filter A raw water cavity is formed at intervals between the pipe 14 and the pre-filter element assembly 13 . A pre-filtered water cavity is formed between the pre-filter tube 14 and the reverse osmosis membrane central tube 12 . The water purification direction of the pre-filter element assembly 13 is from outside to inside, and the water production port in the middle of the pre-filter element assembly 13 is communicated with the pre-filtering water cavity.

The water entering the composite filter element 10 first reaches the raw water cavity, and flows inward from the outer circumference of the pre-filter element assembly 13 . The pre-filtered water filtered by the pre-filter element assembly 13 flows from the water production port to the pre-filter water cavity, and then flows from the first water passage hole 121 to the raw water inlet of the reverse osmosis membrane filter element 11 , enter the reverse osmosis membrane filter element 11 for further filtration.

Specifically, in one embodiment, as shown in FIG. 1 , FIG. 4 and FIG. 6 , the pre-filter assembly 13 includes a first-stage pre-filter 131 and a second-stage pre-filter 132 . The pre-filter element 131 is sleeved outside the second-stage pre-filter element 132 . Then, the first-stage pre-filter 131 and the pre-filter pipe 14 are arranged at intervals to form the raw water cavity.

When the first-stage pre-filter 131 is the origami filter, and the second-stage pre-filter 132 is the carbon rod filter, the origami filter and the pre-filter tube 14 are spaced apart. The raw water cavity is formed. The water production port in the middle of the pre-filter element assembly 13 includes the middle through hole of the carbon rod filter element.

Further, in one embodiment, as shown in FIG. 1 , FIG. 3 to FIG. 7 , the end face of the pre-filter element assembly 13 is provided with a pre-filter element end cover 141 , and the pre-filter element pipe 14 is connected to the front filter element tube 14 . Sealed connection between the end caps 141 of the filter element. The front filter element end cover 141 is provided with a second water passage hole 1411 , and the second water passage hole 1411 communicates with the water production port in the middle of the front filter element assembly 13 . Therefore, the water flowing out of the water production port in the middle of the pre-filter element assembly 13 will flow from the second water-passing hole 1411 to the outside of the pre-filter element end cover 141 .

Specifically, when the pre-filter element assembly 13 includes the origami filter element and the carbon rod filter element, the second water passage hole 1411 communicates with the middle through hole of the carbon rod filter element. As shown in FIG. 3 , FIG. 5 and FIG. 7 , the second water passage hole 1411 is located on the front filter element end cover 141 at a position corresponding to the middle through hole of the carbon rod filter element.

Further, as shown in FIG. 3 , FIG. 5 and FIG. 7 , the end cover 141 of the pre-filter element is tightly sealed against the end face of the pre-filter element assembly 13 , so that the water immersed in the raw water cavity can only be immersed from the outside. It flows through the first-stage pre-filter element 131 and the second-stage pre-filter element 132 in sequence, and then flows out of the pre-filter element end cover 141 from the second water passage hole 1411 .

Further, as shown in FIG. 1 , FIG. 3 to FIG. 7 , the end of the reverse osmosis membrane central pipe 12 close to the pre-filter end cover 141 has a sealing end cover 122 , and the sealing end cover 122 is connected to the end cover 122 . The pre-filter end caps 141 are spaced to form first water-passing gaps 1221, and the first water-passing gaps 1221 communicate with the second water-passing holes 1411 and the pre-filtering water cavity. The water filtered by the pre-filter element assembly 13 can smoothly reach the pre-filtered water cavity.

Further, in one embodiment, as shown in FIG. 1 , FIG. 4 and FIG. 6 , the composite filter element 10 further includes a filter bottle 15 and a rear filter element assembly 16 , the reverse osmosis membrane filter element 11 , the reverse osmosis membrane center The tube 12 , the pre-filter assembly 13 and the rear filter assembly 16 are all located in the filter bottle 15 . The rear filter element assembly 16 and the reverse osmosis membrane filter element 11 are sequentially arranged in the axial direction of the filter bottle 15 . The reverse osmosis membrane filter element 11 and the filter bottle 15 are spaced to form a first pure water gap 151, and the rear filter element assembly 16 and the filter bottle 15 are spaced to form a second pure water gap 152. The first pure water gap 151 communicates with the second pure water gap 152 .

After the water entering the composite filter element 10 is filtered through the pre-filter element 13 and the reverse osmosis membrane filter element 11 in sequence, the pure water discharged from the pure water outlet of the reverse osmosis membrane filter element 11 first arrives The first pure water gap 151 then enters the second pure water gap 152 , and then passes through the rear filter element assembly 16 for further filtration. The rear filter element assembly 16 may be composed of a carbon rod composite ultrafiltration membrane.

Specifically, as shown in FIG. 1 , FIG. 3 to FIG. 7 , in one embodiment, an intermediate seal 18 is provided between the rear filter element assembly 16 and the reverse osmosis membrane filter element 11 , and the intermediate seal There is a gap between 18 and the filter bottle 15 , so that the first pure water gap 151 communicates with the second pure water gap 152 .

Further, in one embodiment, as shown in FIG. 3 , FIG. 5 and FIG. 7 , an intermediate seal 18 is provided between the rear filter element assembly 16 and the reverse osmosis membrane filter element 11 , and the rear filter element The end face of the assembly 16 is pressed against the intermediate seal 18 , and the water entering the second pure water gap 152 can only pass through the rear filter element assembly 16 from the outside to the inside for filtering.

The middle seal 18 is provided with a third water passage hole 181 , and the sealing end cover 122 is provided with a fourth water passage hole 1222 in communication with the third water passage hole 181 . The water entering the fourth water passage hole 1222 comes from the third water passage hole 181 , in other words, the water filtered by the rear filter element assembly 16 will flow from the third water passage hole 181 to the fourth water passage hole 1222. Specifically, the sealing end cap 122 may be pressed against the intermediate sealing member 18 , so that the fourth water passage hole 1222 communicates with the third water passage hole 181 .

As shown in FIG. 1 , FIG. 4 and FIG. 6 , the composite filter element 10 further includes a water guiding central pipe 17 . The water guiding central pipe 17 is inserted into the pre-filter element assembly 13, one end of the water guiding central pipe 17 is communicated with the pure water port 153 of the filter bottle 15, and the other end of the water guiding central pipe 17 passes through. The second water passage hole 1411 communicates with the fourth water passage hole 1222 . The water filtered by the rear filter element assembly 16 will eventually flow from the water guiding center pipe 17 to the pure water port 153 of the filter bottle 15 and be discharged out of the composite filter element 10 for use by the user.

Further, as shown in FIG. 2 , the water guiding central pipe 17 and the side wall of the second water passage hole 1411 are arranged at intervals, and the water guiding central pipe 17 and the pre-filter element assembly 13 are arranged at intervals. The pre-filtered water filtered by the pre-filter element assembly 13 will reach the gap between the water guiding central pipe 17 and the pre-filter element assembly 13, and then pass from the water guiding central pipe 17 and the first The gap between the side walls of the second water passage holes 1411 flows to the first water passage gap 1221 .

Specifically, in one embodiment, the water guiding central pipe 17 is inserted into the carbon rod filter element included in the pre-filter element assembly 13, and the middle through hole between the water guiding central pipe 17 and the carbon rod filter element The sidewall spacing is set.

Further, in one embodiment, as shown in FIG. 3 and FIG. 5 , the intermediate sealing member 18 includes a sealing disc 182 , a sealing cylinder 183 and an outer cylinder 184 . The sealing disc 182 is used to abut against the end surface of the rear filter element assembly 16 , and the third water passage hole 181 is formed on the sealing disc 182 . The sealing cylinder 183 is connected with the end face of the sealing disc 182 facing the reverse osmosis membrane filter element 11 , the sealing cylinder 183 is sleeved outside the reverse osmosis membrane central pipe 12 , and the sealing cylinder 183 is connected to the sealing cylinder 183 . The end caps 122 are sealed and connected, so that the water flowing out from the third water passage hole 181 can only flow to the fourth water passage hole 1222 on the sealed end cap 122 , and then into the water guiding central pipe 17 .

The outer cylinder 184 is connected to the outer peripheral surface of the sealing disc 182, one end of the outer cylinder 184 is sleeved on the outer peripheral surface of the reverse osmosis membrane filter element 11, and the other end of the outer cylinder 184 is sleeved on the rear filter element the outer periphery. On the one hand, the outer cylinder 184 plays a role of limiting protection on the outer peripheral surface of the end of the reverse osmosis membrane filter element 11; flow to the second pure water gap 152 . It is ensured that the water flow in the composite filter element 10 passes through the pre-filter element assembly 13 , the reverse osmosis membrane filter element 11 and the rear filter element assembly 16 in sequence according to the aforementioned flow direction. The outer cylinder 184 and the outer peripheral surface of the reverse osmosis membrane filter element 11 may be sealed by glue or adhesive tape.

More specifically, in one embodiment, as shown in FIG. 3 , the sealing disc 182 is spaced apart from the end face of the reverse osmosis membrane filter element 11 .

Alternatively, the sealing disc 182 is in close contact with the end face of the reverse osmosis membrane filter element 11 . The storage space on the end face of the reverse osmosis membrane filter element 11 is reduced, and the storage of concentrated water is reduced.

Further, as shown in FIG. 5 , in another embodiment, the outer cylinder 184 includes a first part 1841 and a second part 1842 in the axial direction, and the first part 1841 is disconnected from the second part 1842 , The first part 1841 is sleeved on the outer peripheral surface of the rear filter element, the first part 1841 is connected with the sealing disc 182 , and the second part 1842 is sleeved on the outer peripheral surface of the reverse osmosis membrane filter element 11 . And the end of the sealing cylinder 183 away from the sealing disc 182 is provided with a sealing ring 185 , the inner ring of the sealing ring 185 is connected with the sealing cylinder 183 , and the outer ring of the sealing ring 185 is connected with the second sealing ring 185 . Section 1842 is connected. The sealing ring 185 is pressed against the end surface of the reverse osmosis membrane filter element 11 .

Alternatively, in yet another embodiment, as shown in FIG. 7 , the intermediate seal 18 includes a rear filter element end cover 186 , a first connection cylinder 187 , a reverse osmosis membrane filter element end cover 188 and a second connection cylinder 189 . The rear filter element end cover 186 abuts against the end face of the rear filter element assembly 16 , the third water passage hole 181 is formed on the rear filter element end cover 186 , and the first connection cylinder 187 is connected to the rear filter element end cover 186 . The rear filter element end cover 186 is connected to the end surface facing the reverse osmosis membrane filter element 11 . The reverse osmosis membrane filter element end cover 188 is pressed against the end face of the reverse osmosis membrane filter element 11 , and the second connecting cylinder 189 and the reverse osmosis membrane filter element end cover 188 face the end face of the rear filter element assembly 16 connect. The second connection cylinder 189 is sleeved outside the first connection cylinder 187, the first connection cylinder 187 is sleeved outside the reverse osmosis membrane central pipe 12, and the second connection cylinder 189 is connected with the first connection cylinder 189. A sealing member is provided between the cylinders 187 , and a sealing member is provided between the first connecting cylinder 187 and the central pipe 12 of the reverse osmosis membrane.

The sealing element between the first connecting cylinder 187 and the reverse osmosis membrane central pipe 12 can ensure that the water in the third water passage hole 181 flows into the water guiding central pipe 17 . A seal is provided between the second connection cylinder 189 and the first connection cylinder 187 to ensure that the water flowing from the first water passage hole 121 to the outside of the reverse osmosis membrane central pipe 12 can all pass through the reverse osmosis membrane The permeable membrane filter element 11 filters.

Further, as shown in FIG. 1 , FIG. 4 and FIG. 6 , in one embodiment, both the raw water port 154 and the concentrated water port 155 of the filter bottle 15 and the pure water port 153 are arranged on the side of the filter bottle 15 . the same end face. The raw water port 154 is communicated with the raw water cavity, an adapter sleeve is provided on the end face of the reverse osmosis membrane filter element 11 close to the concentrated water port 155 , and the concentrated water outlet is located in this reverse osmosis membrane filter element 11 . The end face of the reverse osmosis membrane filter element 11 and the adapter sleeve are spaced to form a concentrated water cavity, and the concentrated water port 155 is communicated with the concentrated water cavity.

The pure water obtained through the composite filter element 10 for water production will flow out from the pure water port 153 , the concentrated water will flow out from the concentrated water port 155 , and the raw water will enter the composite filter element 10 from the raw water port 154 .

Further, in another embodiment, a water purifier is provided, including the above-mentioned composite filter element 10 .

The water purifier provided by the above solution adopts the composite filter element 10 described in any of the above embodiments, thereby improving the integration degree and prolonging the service life.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims (12)

1. a composite filter core, is characterized in that, comprises reverse osmosis membrane filter core, reverse osmosis membrane central pipe and pre-filter assembly, described reverse osmosis membrane filter core is arranged outside described reverse osmosis membrane central pipe, described reverse osmosis membrane The raw water inlet, pure water outlet and concentrated water outlet of the filter element are respectively located on the inner peripheral surface, outer peripheral surface and end surface of the reverse osmosis membrane filter element, and the pre-filter element assembly is arranged in the reverse osmosis membrane central pipe, so The reverse osmosis membrane central pipe is provided with a first water passage hole, which is used to guide the pre-filtered water produced by the filtering of the pre-filter element assembly to the raw water inlet of the reverse osmosis membrane filter element. 2 . The composite filter element according to claim 1 , further comprising a pre-filter pipe, the pre-filter pipe is sleeved outside the pre-filter assembly, and the pre-filter pipe is located in the front A raw water cavity is formed between the filter element assembly and the reverse osmosis membrane center pipe, the pre-filter element pipe and the reverse osmosis membrane center pipe are spaced apart from each other, and the space between the pre-filter element pipe and the reverse osmosis membrane center pipe A pre-filter water cavity is formed, the water purification direction of the pre-filter element assembly is from outside to inside, and the water production port in the middle of the pre-filter element assembly is communicated with the pre-filter water cavity. 3 . The composite filter element according to claim 2 , wherein the end face of the pre-filter element assembly is provided with a pre-filter element end cap, and the pre-filter element pipe and the pre-filter element end cap are in a sealed connection. 4 . , the front filter element end cover is provided with a second water passage hole, the second water passage hole communicates with the water production port in the middle of the pre filter element assembly, and the reverse osmosis membrane central pipe is close to the front One end of the filter element end cover has a sealing end cover, the sealing end cover and the front filter element end cover are arranged at intervals to form a first water passing gap, and the first water passing gap communicates with the second water passing hole and the Pre-filter water chamber. 4. The composite filter element according to claim 3, further comprising a filter bottle and a rear filter element assembly, wherein the reverse osmosis membrane filter element, the reverse osmosis membrane central pipe, the front filter element assembly and the rear filter element assembly are located at In the filter bottle, the rear filter element assembly and the reverse osmosis membrane filter element are sequentially arranged in the axial direction of the filter bottle, and the reverse osmosis membrane filter element and the filter bottle are spaced apart to form a first pure filter element. a water gap, a second pure water gap is formed between the rear filter element assembly and the filter bottle, and the first pure water gap communicates with the second pure water gap. 5 . The composite filter element according to claim 4 , further comprising a water guiding center pipe, an intermediate seal is provided between the rear filter element assembly and the reverse osmosis membrane filter element, and the rear filter element assembly is provided with an intermediate seal. 6 . The end face of the seal is pressed against the middle seal, the middle seal is provided with a third water passage hole, and the sealing end cover is provided with a fourth water passage which is in communication with the third water passage hole. The water guiding central tube is inserted into the pre-filter element assembly, one end of the water guiding central tube is connected with the pure water port of the filter bottle, and the other end of the water guiding central tube passes through the first The second water-passing hole is communicated with the fourth water-passing hole, the water-conducting center pipe is spaced from the side wall of the second water-passing hole, and the water-conducting center pipe is spaced from the pre-filter element assembly. 6 . The composite filter element according to claim 5 , wherein the intermediate seal comprises a sealing disc, a sealing cylinder and an outer cylinder, and the sealing disc is used to abut against the end face of the rear filter element assembly, so that the The third water passage hole is formed on the sealing disc, the sealing cylinder is connected with the end face of the sealing disc facing the reverse osmosis membrane filter element, and the sealing cylinder is sleeved outside the reverse osmosis membrane central pipe, The sealing cylinder and the sealing end cap are sealedly connected, the outer cylinder is connected to the outer peripheral surface of the sealing disc, one end of the outer cylinder is sleeved on the outer peripheral surface of the reverse osmosis membrane filter element, and the outer cylinder is The other end is sleeved on the outer peripheral surface of the rear filter element. 7. The composite filter element according to claim 6, characterized in that, the sealing disc is abutted against the end face of the reverse osmosis membrane filter element; Alternatively, the sealing disc and the end face of the reverse osmosis membrane filter element are arranged at intervals; Alternatively, the outer cylinder includes a first part and a second part in the axial direction, the first part is disconnected from the second part, the first part is sleeved on the outer peripheral surface of the rear filter element, and the first part is connected to the second part. The sealing disc is connected, the second part is sleeved on the outer peripheral surface of the reverse osmosis membrane filter element, and a sealing ring is provided on the end of the sealing cylinder away from the sealing disc, and the inner ring of the sealing ring is connected to the sealing cylinder. The outer ring of the sealing ring is connected with the second part, and the sealing ring is pressed against the end face of the reverse osmosis membrane filter element. 8 . The composite filter element according to claim 5 , wherein the intermediate seal comprises a rear filter element end cover, a first connection cylinder, a reverse osmosis membrane filter element end cover and a second connection cylinder, and the rear filter element The end cover is pressed against the end face of the rear filter element assembly, the third water passage hole is formed on the rear filter element end cover, and the first connecting cylinder and the rear filter element end cover face the The end face of the reverse osmosis membrane filter element is connected, the end cover of the reverse osmosis membrane filter element is pressed against the end face of the reverse osmosis membrane filter element, and the second connecting cylinder and the end cover of the reverse osmosis membrane filter element face the rear filter element The end faces of the components are connected, the second connection cylinder is sleeved outside the first connection cylinder, the first connection cylinder is sleeved outside the central tube of the reverse osmosis membrane, and the second connection cylinder is connected with the first connection cylinder A sealing element is arranged between the cylinders, and a sealing element is arranged between the first connecting cylinder and the central pipe of the reverse osmosis membrane. 9 . The composite filter element according to claim 5 , wherein the raw water port and the concentrated water port of the filter bottle are arranged on the same end face of the filter bottle as the pure water port, and the raw water port and the The original water cavity is connected, the end face of the reverse osmosis membrane filter element close to the concentrated water outlet is provided with an adapter sleeve, the concentrated water outlet is located on this end face of the reverse osmosis membrane filter element, and the end face of the reverse osmosis membrane filter element is connected to the end face of the reverse osmosis membrane filter element. A concentrated water cavity is formed between the adapter sleeves at intervals, and the concentrated water port is communicated with the concentrated water cavity. 10. The composite filter element according to any one of claims 2 to 9, wherein the pre-filter assembly comprises a first-stage pre-filter and a second-stage pre-filter, the first-stage pre-filter It is sleeved outside the second-stage pre-filter element, and the first-stage pre-filter element and the pre-filter pipe are arranged at intervals to form the raw water cavity. 11 . The composite filter element according to claim 10 , wherein the first-stage pre-filter element comprises an origami filter element, the second-stage pre-filter element comprises a carbon rod filter element, and the product in the middle of the pre-filter element assembly. The nozzle includes a middle through hole of the carbon rod filter element. 12. A water purifier, characterized in that it comprises the composite filter element according to any one of claims 1 to 11.

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